| /* |
| * max8907-regulator.c -- support regulators in max8907 |
| * |
| * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com> |
| * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved. |
| * |
| * Portions based on drivers/regulator/tps65910-regulator.c, |
| * Copyright 2010 Texas Instruments Inc. |
| * Author: Graeme Gregory <gg@slimlogic.co.uk> |
| * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/init.h> |
| #include <linux/mfd/core.h> |
| #include <linux/mfd/max8907.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/regulator/machine.h> |
| #include <linux/regulator/of_regulator.h> |
| #include <linux/regmap.h> |
| #include <linux/slab.h> |
| |
| #define MAX8907_II2RR_VERSION_MASK 0xF0 |
| #define MAX8907_II2RR_VERSION_REV_A 0x00 |
| #define MAX8907_II2RR_VERSION_REV_B 0x10 |
| #define MAX8907_II2RR_VERSION_REV_C 0x30 |
| |
| struct max8907_regulator { |
| struct regulator_desc desc[MAX8907_NUM_REGULATORS]; |
| struct regulator_dev *rdev[MAX8907_NUM_REGULATORS]; |
| }; |
| |
| #define REG_MBATT() \ |
| [MAX8907_MBATT] = { \ |
| .name = "MBATT", \ |
| .supply_name = "mbatt", \ |
| .id = MAX8907_MBATT, \ |
| .ops = &max8907_mbatt_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| } |
| |
| #define REG_LDO(ids, supply, base, min, max, step) \ |
| [MAX8907_##ids] = { \ |
| .name = #ids, \ |
| .supply_name = supply, \ |
| .id = MAX8907_##ids, \ |
| .n_voltages = ((max) - (min)) / (step) + 1, \ |
| .ops = &max8907_ldo_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = (min), \ |
| .uV_step = (step), \ |
| .vsel_reg = (base) + MAX8907_VOUT, \ |
| .vsel_mask = 0x3f, \ |
| .enable_reg = (base) + MAX8907_CTL, \ |
| .enable_mask = MAX8907_MASK_LDO_EN, \ |
| } |
| |
| #define REG_FIXED(ids, supply, voltage) \ |
| [MAX8907_##ids] = { \ |
| .name = #ids, \ |
| .supply_name = supply, \ |
| .id = MAX8907_##ids, \ |
| .n_voltages = 1, \ |
| .ops = &max8907_fixed_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = (voltage), \ |
| } |
| |
| #define REG_OUT5V(ids, supply, base, voltage) \ |
| [MAX8907_##ids] = { \ |
| .name = #ids, \ |
| .supply_name = supply, \ |
| .id = MAX8907_##ids, \ |
| .n_voltages = 1, \ |
| .ops = &max8907_out5v_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = (voltage), \ |
| .enable_reg = (base), \ |
| .enable_mask = MAX8907_MASK_OUT5V_EN, \ |
| } |
| |
| #define REG_BBAT(ids, supply, base, min, max, step) \ |
| [MAX8907_##ids] = { \ |
| .name = #ids, \ |
| .supply_name = supply, \ |
| .id = MAX8907_##ids, \ |
| .n_voltages = ((max) - (min)) / (step) + 1, \ |
| .ops = &max8907_bbat_ops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .owner = THIS_MODULE, \ |
| .min_uV = (min), \ |
| .uV_step = (step), \ |
| .vsel_reg = (base), \ |
| .vsel_mask = MAX8907_MASK_VBBATTCV, \ |
| } |
| |
| #define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \ |
| 750000, 3900000, 50000) |
| #define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \ |
| 650000, 2225000, 25000) |
| |
| static struct regulator_ops max8907_mbatt_ops = { |
| }; |
| |
| static struct regulator_ops max8907_ldo_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| }; |
| |
| static struct regulator_ops max8907_ldo_hwctl_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| }; |
| |
| static struct regulator_ops max8907_fixed_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| }; |
| |
| static struct regulator_ops max8907_out5v_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .enable = regulator_enable_regmap, |
| .disable = regulator_disable_regmap, |
| .is_enabled = regulator_is_enabled_regmap, |
| }; |
| |
| static struct regulator_ops max8907_out5v_hwctl_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| }; |
| |
| static struct regulator_ops max8907_bbat_ops = { |
| .list_voltage = regulator_list_voltage_linear, |
| .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| }; |
| |
| static struct regulator_desc max8907_regulators[] = { |
| REG_MBATT(), |
| REG_LDO(SD1, "in-v1", MAX8907_REG_SDCTL1, 650000, 2225000, 25000), |
| REG_LDO(SD2, "in-v2", MAX8907_REG_SDCTL2, 637500, 1425000, 12500), |
| REG_LDO(SD3, "in-v3", MAX8907_REG_SDCTL3, 750000, 3900000, 50000), |
| LDO_750_50(LDO1, "in1", MAX8907_REG_LDOCTL1), |
| LDO_650_25(LDO2, "in2", MAX8907_REG_LDOCTL2), |
| LDO_650_25(LDO3, "in3", MAX8907_REG_LDOCTL3), |
| LDO_750_50(LDO4, "in4", MAX8907_REG_LDOCTL4), |
| LDO_750_50(LDO5, "in5", MAX8907_REG_LDOCTL5), |
| LDO_750_50(LDO6, "in6", MAX8907_REG_LDOCTL6), |
| LDO_750_50(LDO7, "in7", MAX8907_REG_LDOCTL7), |
| LDO_750_50(LDO8, "in8", MAX8907_REG_LDOCTL8), |
| LDO_750_50(LDO9, "in9", MAX8907_REG_LDOCTL9), |
| LDO_750_50(LDO10, "in10", MAX8907_REG_LDOCTL10), |
| LDO_750_50(LDO11, "in11", MAX8907_REG_LDOCTL11), |
| LDO_750_50(LDO12, "in12", MAX8907_REG_LDOCTL12), |
| LDO_750_50(LDO13, "in13", MAX8907_REG_LDOCTL13), |
| LDO_750_50(LDO14, "in14", MAX8907_REG_LDOCTL14), |
| LDO_750_50(LDO15, "in15", MAX8907_REG_LDOCTL15), |
| LDO_750_50(LDO16, "in16", MAX8907_REG_LDOCTL16), |
| LDO_650_25(LDO17, "in17", MAX8907_REG_LDOCTL17), |
| LDO_650_25(LDO18, "in18", MAX8907_REG_LDOCTL18), |
| LDO_750_50(LDO19, "in19", MAX8907_REG_LDOCTL19), |
| LDO_750_50(LDO20, "in20", MAX8907_REG_LDOCTL20), |
| REG_OUT5V(OUT5V, "mbatt", MAX8907_REG_OUT5VEN, 5000000), |
| REG_OUT5V(OUT33V, "mbatt", MAX8907_REG_OUT33VEN, 3300000), |
| REG_BBAT(BBAT, "MBATT", MAX8907_REG_BBAT_CNFG, |
| 2400000, 3000000, 200000), |
| REG_FIXED(SDBY, "MBATT", 1200000), |
| REG_FIXED(VRTC, "MBATT", 3300000), |
| }; |
| |
| #ifdef CONFIG_OF |
| |
| #define MATCH(_name, _id) \ |
| [MAX8907_##_id] = { \ |
| .name = #_name, \ |
| .driver_data = (void *)&max8907_regulators[MAX8907_##_id], \ |
| } |
| |
| static struct of_regulator_match max8907_matches[] = { |
| MATCH(mbatt, MBATT), |
| MATCH(sd1, SD1), |
| MATCH(sd2, SD2), |
| MATCH(sd3, SD3), |
| MATCH(ldo1, LDO1), |
| MATCH(ldo2, LDO2), |
| MATCH(ldo3, LDO3), |
| MATCH(ldo4, LDO4), |
| MATCH(ldo5, LDO5), |
| MATCH(ldo6, LDO6), |
| MATCH(ldo7, LDO7), |
| MATCH(ldo8, LDO8), |
| MATCH(ldo9, LDO9), |
| MATCH(ldo10, LDO10), |
| MATCH(ldo11, LDO11), |
| MATCH(ldo12, LDO12), |
| MATCH(ldo13, LDO13), |
| MATCH(ldo14, LDO14), |
| MATCH(ldo15, LDO15), |
| MATCH(ldo16, LDO16), |
| MATCH(ldo17, LDO17), |
| MATCH(ldo18, LDO18), |
| MATCH(ldo19, LDO19), |
| MATCH(ldo20, LDO20), |
| MATCH(out5v, OUT5V), |
| MATCH(out33v, OUT33V), |
| MATCH(bbat, BBAT), |
| MATCH(sdby, SDBY), |
| MATCH(vrtc, VRTC), |
| }; |
| |
| static int max8907_regulator_parse_dt(struct platform_device *pdev) |
| { |
| struct device_node *np = pdev->dev.parent->of_node; |
| struct device_node *regulators; |
| int ret; |
| |
| if (!pdev->dev.parent->of_node) |
| return 0; |
| |
| regulators = of_find_node_by_name(np, "regulators"); |
| if (!regulators) { |
| dev_err(&pdev->dev, "regulators node not found\n"); |
| return -EINVAL; |
| } |
| |
| ret = of_regulator_match(&pdev->dev, regulators, max8907_matches, |
| ARRAY_SIZE(max8907_matches)); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", |
| ret); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static inline struct regulator_init_data *match_init_data(int index) |
| { |
| return max8907_matches[index].init_data; |
| } |
| |
| static inline struct device_node *match_of_node(int index) |
| { |
| return max8907_matches[index].of_node; |
| } |
| #else |
| static int max8907_regulator_parse_dt(struct platform_device *pdev) |
| { |
| return 0; |
| } |
| |
| static inline struct regulator_init_data *match_init_data(int index) |
| { |
| return NULL; |
| } |
| |
| static inline struct device_node *match_of_node(int index) |
| { |
| return NULL; |
| } |
| #endif |
| |
| static int max8907_regulator_probe(struct platform_device *pdev) |
| { |
| struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent); |
| struct max8907_platform_data *pdata = dev_get_platdata(max8907->dev); |
| int ret; |
| struct max8907_regulator *pmic; |
| unsigned int val; |
| int i; |
| struct regulator_config config = {}; |
| struct regulator_init_data *idata; |
| const char *mbatt_rail_name = NULL; |
| |
| ret = max8907_regulator_parse_dt(pdev); |
| if (ret) |
| return ret; |
| |
| pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); |
| if (!pmic) { |
| dev_err(&pdev->dev, "Failed to alloc pmic\n"); |
| return -ENOMEM; |
| } |
| platform_set_drvdata(pdev, pmic); |
| |
| memcpy(pmic->desc, max8907_regulators, sizeof(pmic->desc)); |
| |
| /* Backwards compatibility with MAX8907B; SD1 uses different voltages */ |
| regmap_read(max8907->regmap_gen, MAX8907_REG_II2RR, &val); |
| if ((val & MAX8907_II2RR_VERSION_MASK) == |
| MAX8907_II2RR_VERSION_REV_B) { |
| pmic->desc[MAX8907_SD1].min_uV = 637500; |
| pmic->desc[MAX8907_SD1].uV_step = 12500; |
| pmic->desc[MAX8907_SD1].n_voltages = |
| (1425000 - 637500) / 12500 + 1; |
| } |
| |
| for (i = 0; i < MAX8907_NUM_REGULATORS; i++) { |
| config.dev = pdev->dev.parent; |
| if (pdata) |
| idata = pdata->init_data[i]; |
| else |
| idata = match_init_data(i); |
| config.init_data = idata; |
| config.driver_data = pmic; |
| config.regmap = max8907->regmap_gen; |
| config.of_node = match_of_node(i); |
| |
| switch (pmic->desc[i].id) { |
| case MAX8907_MBATT: |
| if (idata && idata->constraints.name) |
| mbatt_rail_name = idata->constraints.name; |
| else |
| mbatt_rail_name = pmic->desc[i].name; |
| break; |
| case MAX8907_BBAT: |
| case MAX8907_SDBY: |
| case MAX8907_VRTC: |
| idata->supply_regulator = mbatt_rail_name; |
| break; |
| } |
| |
| if (pmic->desc[i].ops == &max8907_ldo_ops) { |
| regmap_read(config.regmap, pmic->desc[i].enable_reg, |
| &val); |
| if ((val & MAX8907_MASK_LDO_SEQ) != |
| MAX8907_MASK_LDO_SEQ) |
| pmic->desc[i].ops = &max8907_ldo_hwctl_ops; |
| } else if (pmic->desc[i].ops == &max8907_out5v_ops) { |
| regmap_read(config.regmap, pmic->desc[i].enable_reg, |
| &val); |
| if ((val & (MAX8907_MASK_OUT5V_VINEN | |
| MAX8907_MASK_OUT5V_ENSRC)) != |
| MAX8907_MASK_OUT5V_ENSRC) |
| pmic->desc[i].ops = &max8907_out5v_hwctl_ops; |
| } |
| |
| pmic->rdev[i] = regulator_register(&pmic->desc[i], &config); |
| if (IS_ERR(pmic->rdev[i])) { |
| dev_err(&pdev->dev, |
| "failed to register %s regulator\n", |
| pmic->desc[i].name); |
| ret = PTR_ERR(pmic->rdev[i]); |
| goto err_unregister_regulator; |
| } |
| } |
| |
| return 0; |
| |
| err_unregister_regulator: |
| while (--i >= 0) |
| regulator_unregister(pmic->rdev[i]); |
| return ret; |
| } |
| |
| static int max8907_regulator_remove(struct platform_device *pdev) |
| { |
| struct max8907_regulator *pmic = platform_get_drvdata(pdev); |
| int i; |
| |
| for (i = 0; i < MAX8907_NUM_REGULATORS; i++) |
| regulator_unregister(pmic->rdev[i]); |
| |
| return 0; |
| } |
| |
| static struct platform_driver max8907_regulator_driver = { |
| .driver = { |
| .name = "max8907-regulator", |
| .owner = THIS_MODULE, |
| }, |
| .probe = max8907_regulator_probe, |
| .remove = max8907_regulator_remove, |
| }; |
| |
| static int __init max8907_regulator_init(void) |
| { |
| return platform_driver_register(&max8907_regulator_driver); |
| } |
| |
| subsys_initcall(max8907_regulator_init); |
| |
| static void __exit max8907_reg_exit(void) |
| { |
| platform_driver_unregister(&max8907_regulator_driver); |
| } |
| |
| module_exit(max8907_reg_exit); |
| |
| MODULE_DESCRIPTION("MAX8907 regulator driver"); |
| MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_ALIAS("platform:max8907-regulator"); |